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Date:      Tue, 29 Nov 2016 10:56:18 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-net@FreeBSD.org
Subject:   [Bug 214913] SO_KEEPALIVE does not work?
Message-ID:  <bug-214913-2472-VH825Z1T9B@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-214913-2472@https.bugs.freebsd.org/bugzilla/>
References:  <bug-214913-2472@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D214913

Andrey V. Elsukov <ae@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |ae@FreeBSD.org

--- Comment #1 from Andrey V. Elsukov <ae@FreeBSD.org> ---
SO_KEEPALIVE option doesn't mean that your connection will live forever. It
only enables keepalive probes. These probes are carried out to determine th=
at
your connection is still alive. Note, not for keeping it alive.

In FreeBSD by default net.inet.tcp.always_keepalive variable configured to
assume SO_KEEPALIVE on all TCP connections. But first keepalive probe will =
be
made only after 2 hours of idle state. This is controlled by
net.inet.tcp.keepidle variable.

Just have tested keepalive probes with lowered idle time to 65 seconds on
FreeBSD 12.0. All works as expected.

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